Key Pharmaceuticals, Inc.
54Patents
0Active
54Granted
38Portfolio score
Filing activity: Sep 5, 1974 → Aug 7, 1991
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4297995A | Bandage containing attachment post | Emerging Cross-Sectional Technologies | 1,151 | Expired |
| US4484577A | Drug delivery method and inhalation device therefor | Human Necessities | 260 | Expired |
| US4722726A | Method and apparatus for iontophoretic drug delivery | Human Necessities | 143 | Expired |
| US4292303A | Polymeric diffusion matrix containing clonidine | Human Necessities | 118 | Expired |
| US4492685A | Protective skin matrix | Human Necessities | 100 | Expired |
| US5186938A | Adhesive transdermal dosage layer | Human Necessities | 95 | Expired |
| US4587118A | Dry sustained release theophylline oral formulation | Human Necessities | 79 | Expired |
| US4556678A | Sustained release propranolol tablet | Human Necessities | 61 | Expired |
| US4294820A | Polymeric diffusion matrix containing phenylephrine | Human Necessities | 60 | Expired |
| US4460562A | Polymeric diffusion matrix containing propranolol | Chemistry; Metallurgy | 59 | Expired |
| US4291015A | Polymeric diffusion matrix containing a vasodilator | Human Necessities | 58 | Expired |
| US4555399A | Aspirin tablet | Human Necessities | 57 | Expired |
| US3939842A | Hemorrhoidal device | Human Necessities | 57 | Expired |
| US4708867A | Minipellets | Human Necessities | 46 | Expired |
| US4634587A | Sustained release quinidine dosage form | Human Necessities | 45 | Expired |
| US4466953A | Polymeric diffusion matrix | Human Necessities | 43 | Expired |
| US4470962A | Polymeric diffusion matrix | Human Necessities | 41 | Expired |
| USD267510S | Bandage | General | 40 | Expired |
| US4764381A | Percutaneous penetration enhancer of oleic acid and 2-ethyl-1, 3-hexanediol | Human Necessities | 39 | Expired |
| US4579731A | Polymeric diffusion burn matrix and method of use | Human Necessities | 34 | Expired |
| US4585452A | Transdermal systemic dosage forms | Human Necessities | 31 | Expired |
| US4679555A | Method and apparatus for intrapulmonary delivery of heparin | Human Necessities | 31 | Expired |
| US4438139A | Polymeric diffusion matrix containing estrogens | Human Necessities | 30 | Expired |
| US4542013A | Trinitroglycerol sustained release vehicles and preparation therefrom | Human Necessities | 30 | Expired |
| US4291014A | Polymeric diffusion matrix containing estradiol diacetate | Human Necessities | 29 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.